HoRX Series Aluminium Housed Resistors High Power Wirewound Resistors Chassis Mount Resistors | 5W-500W
Resistance Range: 0.01Ω to 82KΩ.
TCR: Options ranging from ±20 to ±350 ppm/°C depending on model.
Withstand Voltage: Up to 2500V
Wide Temperature Tolerance: Operating range from -55°C to +275°C
High Precision: Resistance tolerance as low as ±1%
Superior Thermal Management (Chassis Mount): Designed for direct mounting on a metal chassis or heatsink to utilize the"heat-sink effect,"enabling high power dissipation within a compact physical footprint.
Rugged Encapsulated Construction: Features a housing that provides total environmental protection against moisture, dust, and contaminants.
High Power-to-Volume Ratio: Capable of handling significant wattage (typically 5W to 500W) while maintaining a small size, making it ideal for space-constrained enclosures.
All-Welded Structural Integrity: Internal resistive elements are fully welded to the terminals rather than soldered, ensuring maximum reliability under mechanical vibration and thermal shock.
Exceptional Stability and Precision: Offers excellent long-term stability (typically <1% resistance change) and is available in tight tolerances (as low as ±1%) with low Temperature Coefficient of Resistance (TCR).
High Dielectric Strength: Engineered with high-grade insulation materials to provide superior voltage withstanding capability (often up to 2500V or more) between the resistive element and the aluminium case.
Ayrton-Perry Non-Inductive Winding: Available in non-inductive (NI) styles for high-frequency applications, minimizing reactive components and signal distortion.
Broad Operating Temperature Range: Proven performance in extreme environments, with an operational range typically spanning from -55°C to +275°C.
Series | Power | Resistance (min) | Resistance (max) | Tolerance | TCR (ppm/℃) | Milliohm Part |
HoRX | 5W~500W | 0.01 Ω | 82 KΩ | ±1%,±5% | ≤250ppm | HoRX |
1. Industrial Automation
Application Scenario: Variable Frequency Drives (VFDs), Servo Motor Controllers, and CNC Machine Tools,industrial power resistors
Role/Function:
Dynamic Braking : braking resistors for VFD, When a heavy industrial motor slows down or stops, it generates"regenerative energy."
The aluminum housed resistor acts as a Braking Resistor to consume this energy as heat, preventing it from damaging the drive’s DC bus capacitors.
Inrush Current Limiting: Used during the"soft start"phase to limit the initial surge of electricity when the equipment is first powered on.
2. Renewable Energy
Application Scenario: Wind Turbine Pitch Control and Solar Grid-tie Inverters.
Role/Function:
Pitch Control Load: In wind turbines, these resistors are used in the pitch control system to dissipate excess energy when the blades are feathered (adjusted) during high-wind emergencies.
Grid Discharge: In solar inverters, they serve as Discharge Resistors to safely bleed off high-voltage electricity from the DC link capacitors when the system is shut down for maintenance.
3. Transportation & Electric Vehicles
Application Scenario: EV pre charge resistors EV Battery Management Systems (BMS), Charging Posts, and Railway Traction Systems.
Role/Function:
Pre-charge Resistor: In EVs, before the main contactor closes, this resistor"pre-charges"the inverter's input capacitors to prevent a massive current spark that could weld the contacts or blow fuses.
Railway Traction Braking: On a much larger scale (e.g., 300W-500W models), they dissipate the kinetic energy of trains during braking, ensuring a safe and controlled stop.
4. Telecommunications
Application Scenario: Telecom Base Stations and Radio Frequency (RF) Equipment.
Role/Function:
Dummy Load : Used to simulate an antenna or a specific circuit load during testing and calibration of transmitters without radiating radio waves into the atmosphere.
Power Distribution Stability: They provide stable resistance for power balancing in complex distribution networks, ensuring high-frequency signals are not distorted by voltage fluctuations.
5. Aerospace & Defense
Application Scenario: Radar Power Supplies, Satellite Communication Systems, and Jet Engine Controls.
Role/Function:
Snubber Resistor: Used in high-speed switching power converters to suppress (snub) voltage spikes across semiconductors (IGBTs/MOSFETs), protecting critical electronics from failure.
Reliability Under Stress: Because they meet MIL-PRF-18546 standards, they ensure the circuit remains functional under extreme vibration (G-force), rapid thermal shock, and high-altitude low-pressure environments.- During the use of the product, pay attention to surface protection to prevent defects such as bumps and scratches on the product surface.
- When installing and using the product, avoid the influence of mechanical stress on the product.
- The long-term operating power of the product should be less than or equal to the rated power to avoid resistance drift caused by overload during long-term use.
- When using the product under high-temperature or poor heat dissipation conditions, the power reduction curve should be referred to for derating application
- Aluminum shell High Power Resistor/Surface Mount Resistors
